Engine stop mechanism



(No Model.) 3 Sheets-Sheet 1. J H CARY ENGINBSTOP MEGHANISM.

No. 583,326. Patented May 25,1897.

(No Model.) 3 Sheets-Sheet 2. J. H. OARY.

ENGINE STOP MEGHANISM No. 583,326. Patented May 25,1897.

%itweooeo 94 J/J/ @C (No Model.) 3 Sheets-Sheet 3.

J H GARY ENGINE STOP MEGHANISM.

No. 583,326. Patented May 25,1897.

UNllTED STATES PATENT OFFICE.

JAMES H. CARY, OF SPRINGFIELD, MASSACHUSE"TS, 1 SSIGNOR OF ONE- THIRD TO THE SPRINGFIELD ENGINE STOP COMPANY, OF MAINE.

ENGINE STOP MECHANiSM.

A SPECIFICA'TION forming part of Letters Patent No. 583,326, dated May 25, 1897.

Application filed May 9, 1896. Serial No. 590,834. (No model.)

Tu (tu Loh/0772 ii; ;ILI/y cubeuribx Be it known that I, JAMES Il. CARY, a citizen of the United States of America, residin g in Springflcld, in the countyof Hampden and State of Massachusetts, have invented new and useful Improvements in Devices for Stoppin g Engines or other Moving Machinery, of which the following is a speciflcation, reference being had to the accompanyin g d rawin gs and letters and figures of reference marked thereon.

My invention relates to devices for actual'.- ing electromechanical apparatus located at con siderable distance from the point where it is desirable to operate the same by means of electromagnetic apparatus placed in a closed circuit, said circuit being constantly charged with a currentof the proper predetermined intensity and quantity so long as the machinery to be controlled is in operation.

I do not seek to clain, broadly, the use of electric energy as a means of stopping moving machinery, but the use of apparatus herein referred to in connection with a closed or live circuit.

It will be Obvious to those Versed in the art that there are many conditions wherein a closed circuit is preferable to an open circuit when used as a means for protection or Safety. For instance, v a closed circuit properly arranged will give notice of its own derangement should such accident occur, whereas a similar trouble on an open circuit would probably be unknown until the critical moment arrived when it is nost essential that the apparatus should be operative.

The invention consists in the construction an d arrangement of parts in combination with valves and valve-operating mechanism of engines, as herein set out.

In the accompanying drawings, in which like letters and figures indicate like parts, Figure 1 illu'strates a simple ball-governor adapted to shut off the steam from an engine or the water from a wheel when caused to operate, illustrating the arrangement of a cylinder in operative connection with the governor and an inlet-valve controlled by a lever. Fig. 2 is a like view of a similar device especially adapted for water-whcels or other motors requiring considerable power to operate the shut-off. Fig. 3 is a diagramnatic view showing the relation of the several parts of the mechanism ,showing also a recordin g apparatus, switches, contact-points, indicator, alarm-bell, conducting-wircs, &c. Fig. 4 is a detail ol' the lever which carries the stylus which makes a record on the dal placed in the recording apparatus *for that purpose. Fig. 5 illustrates a nodification of my device, wherein I illustrate the en'ploynent of a gate lever-valve to be used as a throttle in the main steam-supply pipe to the engine instead of operating upon the governor, as before illustrated. l alsoillustrate therein the cmployment of a magnet in a local open circuit to control the stop mechanism, the same magnet being controlled by a relay in the main line and nornally a closed circuit, and in connection with the relayI show an alarmbell in the local circuit thereof 'for the purpose of giving an audible alarm to the engineer.

In detail, A, 1 and A" indicate arnatures; B and B', electromagnets; 13", a relay; O, a circuiL-indicator; D,a generator; D a closedcircuit battery; E, switches; E', a circuitbreaking wheel E", a closed contact-key; F, F', and F", local batteries; G and G', signalbells; ll and H speed-limit arms; I, insulating-support for same; J, relay; K, retaininglever; L, lever to control steam-valve; L', lever to push up the rod U; M, adjusting-screw; N, a relay-magnet; O, contact-point 011 governor-red; P, piston-rod; Q, steam-cylinder; R, retaining-lever; S, shunt-coils; T, electromagnet for recording mechanism; U, governor-rod; V, steam-valve; valve-lever; X, resistance-coil; Y, gate-Valve, and Z recording-dial; a and Z), contact-points of relay N; a and d, electrical contact-points of speedlimit; e, wire Connecting point c to point d; e', contact-lever to close circuit of bell G'; f, spiral spring; f', contact-spring to close circuit of bell G' g, lever fastened to armature of magnet h; h, electromagnet for operating stylus; 'i, eccentric; j, lever carrying stylus; k, sleeve on which leverj is mounted l, spiral spring; m, loose sleeve on leverj; 72, stylus 5 o, stud holding lever-j; 1), pivot for lever R; q, detent controlling escapeinent; 'r, retractile spring; s, adjusting-screw; t, pivot for armature A; u stop-pili; 2; and r', retractile Springs; w, steam-pipe con nectin g valve with IOO eylinder; w', weight to operate the governorrod U in Fig. 2. w is a eounterweight to take slack out of chain to governor-red lever; 91:, detent on armature A; y and .2, contactpoints for relay B.

Numerals 1 to 14, inclusive, indieate the main-line eireuit-wires; 15, 10, and 17, the circuit-wires of alarn-bell N; 18, 19, and 20, local eircuit of the 'reeording meehanism; Si, 22, and 23, local eircuit of alarn-bell G'.

In Fig. 1, L represents the end of the lever which, when in its normal position for action, holds down by pressure the Valve which is placed under the end beyond the fulcrum opposite to the end which engages the lover K, which extends upward from the armature A, being piroted at t and held up to the electromaguet B so long as the current is on the line designed to energize the same.

M is an adjusting-screw to regulate the tension of the retractile spring 7'.

R is a lever with weight at the end pivoted on the stud p and designed to engage the lower end of the lover K. The Object of this lever is to hold tle levers K and L in their proper engagenent, should it be desirable to do so when there is no current on the line. As soon as the proper current is thrown to the line, however, the arnature A willbe attracted su'lliciently toward its magnet B to disengage the lerer K from the levcr R,which will perinit it to assune a Vertical position, thus leaving the lever K 'free to act to the full linit of its designed backward inovement. This is su l'flcient to disengage it 'from leVer L.

C is a current-indicator placed in the line to deter nine the strength of the current sent to line from the generator l Part-s lettered E are single-point switches designed to open the line when required.

X is a resistance-@oil placed at the extreme end of the circui t, designed to l i mit the amount of current upon the line while in its normallyacting condition.

N is a relay placed in eircuit for the pu rpose of controlling the alarn-bell G, placed in local eircuit with the relay, whose armature is so adjusted by the retraetile spring as to remain normally open; but it a short eircuit should oceur on a part of the line, thus shunting the resistance X, the increase o't the electronotive force in the magnet of N would attract its arnature, closing the local eircuit at points a and Z) through battery F and bell G, and ring the bell G, thus giving notice of the trouble on the line.

II and II' are nctallic arms which act as speed-limits,between which plays the con tactpoint O, which projects from the governorrod U. H" is hinged at the end, so as to allow the free backward passage of the governor-red if it should pass below the lower limit owing to any aecident to the governor meehanisni. The arms H II' are pivoted to the insulatingblock I, the points c and (Z on the same being conneeted together by the wire e.

Parts S represent shunt-eoils around the electronagnets, the object of the same being to reduee the sparking el't'eet which might oceur :from indnctive action upon a separation at the points c or (Z while a current was on the line.

E represents a box containing a eircuitbreaking wheel which is actuated by the reeoil of a heavy spring which operates a train which conveys motion to the break-wheel, which opens and closes the eircuit a deIinite number of times during each revolution or partial revolution, thus providing a means forindieating the point from which the alarn was sent in. l do not describe the mechanisn of this call-box, as it is one ol' ihe wellknown forns in general use on district-messenger or wateh-elock circuits.

J represents a relay designed to control the action of the reeording apparatus shown in connection with dial Z.

The train and actuating-spring, retainingleVer, and nagnet of the recording apparatus are represented in the figure below the dial Z separated from their actual position in relation to the dial for the purpose of more fully showing the relation of the various parts. The Object oi' the recording apparatus is to make a record upon a paper dial placed OVGl' the dial Z when the current is sent to or interrupted upon the lines connected with the same.

71/ is an eleetromagnet, to the arnature of which is attached lhebar, pivoi cd at its upper end.`

j is a lever pivotcd at Z', carrying a siylus at its end near bar g.

0 is a sleeye which noves freely on the stud holding the same, permitting the lover to make a lateral nioVenen t while nakin a record on the dial.

7? is an eecentric which is caused to rotate by the action of its accompanyi'g train and motive power, either a spring or weight. The eccentric 'i during its rotation presses against the end of the leverj, causingthe point of the same to change its position in relation to the dial, which it punctures or marks.

m is a sleeve adjusted to revolVe freely on the end of the lever the purpose of the same being to reduce the i'rietion between the lOVGl' j and the eccentric i incident to its ibratory movement while making a record on the dial.

T represents an electromagnet, the armature of which controls the moyement of the train which actuates the reeording apparatus. At the lower end of the bar carrying the armature projects the detent g, which intervenes in the path of the pin it in the escapement-wheel of the train, preventing the 'forward movement of the same except at such times when the action ol' the current upon the line allows such novement to take place.

a' is a i'etractile spring controlled by the adjusting-screw for the purpose of withdrawing the arnature from the magnet T upon the interruption of the current upon the line.

Fig. 5 represents the ValVe-controlling ap- ICO IOS

IIU

pliances in a local eircuit which is rendered operative by the action of the relay B", the armature A" of which is released by interruption of the current on the main line allowing it to close contact-points y and e', thus elosin g the normally open eircuit through its local battery and the magnet 13' drawing toward it the arnatnre A' held open by the action of the weighted levcr at its lower end,`

said armature acting as a retaining-lever to hold. up the lever L. This will allow the release of the lever L, which will permit the operation, of the power which will stop the engine. In connection with the relay B, I show a detent w, attached to the armature A". The detent has a hook upon the end adjusted so as to en gage the hook on the end of the lever c', the lever e being so arranged as to make contact with point f and so close a local eircuit through the battery F and alarm-bell G thus giving an audible alarn to the engineer.

Y represents a sliding gate-Valve to be placed in main supply-pipe, which furnishcs steam for the operation of the engine.

Q represents a steam-cylinder; P, the piston-rod of the same which upon the ad mission of steam is forced upward, pushing up the lever \V closing the gate of yalve Y.

The method of operation of the whole apparatus is to keep the main line eonstantly charged by either a dynamo of magneto-clectrie generator or closed-eircuit battery so that when the line is broken at any point an impulse shall be transmitted to the various acting parts to stop the engine and the dependent machinery. Upon the breaking of the eircuit the armatnre A will be drawn away from the magnet B, allowing the release of the leVer L, which will pernit the immediate operation of the designated power which shall stop the machinery. Upon an undue increase of the speed of the engine the point on the governor-red would be thrown against arn Il, breaking contact at c, stopping the machinery as before. The same result will be obtained should the governor, owing to accident, 'fall from its nornal limit, contact then being broken at d.

The method of operation of the recording apparatus is to turn the crank E' down to its extreme limit, which will immediately break the eircuit and cause the stopping of the machinery. The break-Wheel will continue its movement, however, sending to line a definite number of electric inpulses and finally automatically close the eircuit again.

The passage of the current over the line during its moyenient will actuate the magnets j, h, and T and their cooperative mechanism, causing to be`registered on the dial the number of the station from which the alarm was sent in.

I do not limit myself to the use of the particular mechanism shown in the recordingclock, as a number of the well known watch* man s clock-novements would acconplish the same result.

The method and operation of the apparatus shown in Fig. 2 is to break the flow of the current upon the line, which will release the armature A, which will be drawn back by the spring 7'. This will withdraw the leVer K 'from the path of le er L, allowing it to fly upward and drop the weight w from its lower end, which will in turn, through the means of the chain attached, pull forward the lever L', thus thrusting up the governor to its highest linit, and by this means stop the engine and such machinery as may be con nected thereto.

Having, therefore, deseribed my invention, what I claim, and desire to secure by Letters Patent, is-

1. In a shut-off apparatus the combination of a steam-cylinder with a piston and pistonrod, a pipe eonnecting the cylinder to a pressurc-yalve, said valve being connected with the main steam snpply, a pivotedlever to control the action of the pressure-Valve, a lever extendin g from and rigidly-fastened to the armature of an electromagnet, a current-indicator, a dynamo-electric or magneto-electric generator or battery, a speed-limiting attachment, a governor having aprojection attached to the governor-red to cngage and operate said speed-limit, a relay including an alarmbell and its operating-battery in local eircuit, a resistance-coil to regulate the anount of effective current upon the line, shunt-coils to reduce the reactionary inductive effect upon the line, 'incident to breaking the eircuit, switches or keys or a break-Wheel for normally Opening the eircuit and recording apparatus for registering a break in the eircuit, substantially as describcd.

2. The combination of a steam -cylinder haVin g a piston and piston-rod the latter arranged to engage a leyer which operates to close a gate-valve, a steam-pipe connected with the cylinder to conveysteam to the same, a pressure-valve adapted to admit or prevent the admission of steam to the cylinder according to its position, a leyer adjusted to control the action of the pressure-valve, an electromagnet whose armature is arranged to arrest the downward movement of the retaining-lever, the said electromagnet being arranged to operate in open eircuit, a battery in said local eircuit, a relay connected with a main line which is operated as a closed circuit, a battery or generator to energize the main eircuit which in tu rn controls the aforesaid open or local circuit, contact keys or switches arranged to pcrmit the main line to be opened at will, an alarm-bell placed in eircuit with a local battery and arranged to operate by the action of the main-line relay, a detent on the armature of the relay, alever arranged to engage with the detent on the armaturc, and to fall upon a contact-point beneath and complete the eircuit through the alarm boll and its accompanying battery when a break upon the main line permits the release of the armature of the main-line re- IOO IIO

ver c', contact-sprin g f and connecting-wires' therewith, substantially as and for the purposes described.

4. In a shut-off apparatus the combination of a governor with a lever for elevating the same, a weight and chain'arranged to aetuate said lever, a counterweight to take slack out of said chain, a retaining-lever to sustain the motive weight, an electromagnet whose armature is provided with an arm or lever extending therefrom to engage the retaining-lever, an electric generator, a current-indicator, switches or keys to open the circuit, a speedlinit, an alarm-bell to indicate the improper eondition of the main circuit, a resistancecoil to limit the amount of current 011 the circnit, a relay to control the action of a recordin g apparatus included in its local circuit, an electromagnet in the said local circuit to control the action of the recording mechanisn and an eleetromagnet to control through the action of its armature the movements of the recording-meehanism train, substantially as and for the purposes deseribed.

5. In a shut-off apparatus the combination of a governor-rod U with a lever L' Weight w, lever L, lever K, armature A, electromagnet B, generator D, current-indicator C, switchcs E, call-box E', relays J, and N, electromagnet T, batteries F F and F, alarm-bells G and G', rccording-magnet h, levers g andj, sleeves k and m spring Z, stud 0 and stylus n, detent q, stop-pin u, eecentric 7,' and dial Z, all as and for the purposes described.

6. In conlination with a motor, shut-off nechanisn consisting cssentially of a shut-ofi".` eylinder with its piston-rod arranged to shut ol'f the supply of steam or other power to the motor, a conduit extending from the shut-oil? cylinder to the boiler or other rescrvoir of power, a valve arranged in said conduit and means to operate said valve at a point remote therefrom consistin g of an electromagnet having its armature held in position against the cores by the continuous energizing of the electromagnets, a spring arranged to move the armature from its normal position when the magnet ceases to be energized by the breaking of the current whereby the valve-operating mechanism is released and allowed to operate whenever the arnature is moved as aforcsaid, and a circuit and an alarm-bell arranged to be put in operation by a like movenent of the armature whenever the main circuit is broken, substantially as shown.

7 The combination with a motor of a stop mcchanism consisting of a governor having a projection whose position is governed by the speed of the motor, two arms arranged in the path of said projeetion, a shut-off adaptcd to be putin operation by the release of an armature, a nagnet and arnature, the latter leld in nornal position by a continuous current passing` through the magnet and means to move the armature from its nornal position when the current is broken and the nagnet thereby ceases to be energized, said arnatnre being arranged to prevent the operation of the shut-off when held against the nagnet and to release and allow it to operate when moved from the magnet, the projection on the governor being arranged to break the eireut when brought against either of said arns, substantially as shown.

JAMES H. CARY.

\Vitnessesz J. l). MILLER, ALLEN WEBsrE-. 

